Dell Precision T5500 (Early 2009) - Manual (Page 13)

2-2-1 1st 64 K RAM chip or data line failure - bit 4 4-2-4 Unexpected interrupt in Protected Mode
2-2-2 1st 64 K RAM chip or data line failure - bit 5 4-3-1
RAM test in progress or failure above address
0FFFFh
2-2-3 1st 64 K RAM chip or data line failure - bit 6 4-3-2 No memory in Bank 0
2-2-4 1st 64 K RAM chip or data line failure - bit 7 4-3-3
Interval Timer Channel 2 test in progress or
failure
2-3-1 1st 64 K RAM chip or data line failure - bit 8 4-3-4 Time-Of-Day Clock test in progress or failure
2-3-2 1st 64 K RAM chip or data line failure - bit 9 4-4-1 Super I/O chip failure
2-3-3 1st 64 K RAM chip or data line failure - bit A 4-4-4 Cache test failure
2-3-4 1st 64 K RAM chip or data line failure - bit B
2-4-1 1st 64 K RAM chip or data line failure - bit C
2-4-2 1st 64 K RAM chip or data line failure - bit D